Although you’ll always pay a premium for them, Eye-Fi is one of the few companies doing something unique in the memory card space with their line of Eye-Fi Pro WiFi memory cards. The Eye-Fi cards, which adds WiFi uploads to your machine or even online services like Flickr from any camera, are excellent, but the latest flagship update, the Eye-Fi Pro X2 is faster, smarter and has pretty much endless storage.

The new Eye-Fi Pro X2 secure digital card boasts faster read and write speeds than the old Eye-Fi Pro, as well as much faster uploading thanks to the adoption of 802.11n WiFi. That should result in a upload speed boost of 100%, according to the company.

But probably more impressive than the faster speeds is the newest Eye-Fi Pro X2 feature, Endless Memory. Think of it as intelligent media offloading: you can fill your 8GB Eye-Fi Pro X2 card to its maximum capacity, but when you run out of space, the card will automatically delete photos from the card that have already been uploaded. You can even specify how much of a storage buffer you’d like to leave on the card at all times, just in case you aren’t near a WiFi network for a long period of time.

A nice card indeed, but with more and more cameras picking up WiFi, and with a suggested retail price of $150 compared to the 20 or 30 bucks an SD usually costs, you probably won’t drop the cash for one. They’re available for preorder today.